fs/xfs/quota/xfs_qm_syscalls.c

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18
  19 #include <linux/capability.h>
  20
  21 #include "xfs.h"
  22 #include "xfs_fs.h"
  23 #include "xfs_bit.h"
  24 #include "xfs_log.h"
  25 #include "xfs_inum.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_sb.h"
  28 #include "xfs_ag.h"
  29 #include "xfs_dir.h"
  30 #include "xfs_dir2.h"
  31 #include "xfs_alloc.h"
  32 #include "xfs_dmapi.h"
  33 #include "xfs_quota.h"
  34 #include "xfs_mount.h"
  35 #include "xfs_bmap_btree.h"
  36 #include "xfs_alloc_btree.h"
  37 #include "xfs_ialloc_btree.h"
  38 #include "xfs_dir_sf.h"
  39 #include "xfs_dir2_sf.h"
  40 #include "xfs_attr_sf.h"
  41 #include "xfs_dinode.h"
  42 #include "xfs_inode.h"
  43 #include "xfs_ialloc.h"
  44 #include "xfs_itable.h"
  45 #include "xfs_bmap.h"
  46 #include "xfs_btree.h"
  47 #include "xfs_rtalloc.h"
  48 #include "xfs_error.h"
  49 #include "xfs_rw.h"
  50 #include "xfs_acl.h"
  51 #include "xfs_cap.h"
  52 #include "xfs_mac.h"
  53 #include "xfs_attr.h"
  54 #include "xfs_buf_item.h"
  55 #include "xfs_utils.h"
  56 #include "xfs_qm.h"
  57
  58 #ifdef DEBUG
  59 # define qdprintk(s, args...)   cmn_err(CE_DEBUG, s, ## args)
  60 #else
  61 # define qdprintk(s, args...)   do { } while (0)
  62 #endif
  63
  64 STATIC int      xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
  65 STATIC int      xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
  66                                         fs_disk_quota_t *);
  67 STATIC int      xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
  68 STATIC int      xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
  69                                         fs_disk_quota_t *);
  70 STATIC int      xfs_qm_scall_quotaon(xfs_mount_t *, uint);
  71 STATIC int      xfs_qm_scall_quotaoff(xfs_mount_t *, uint, boolean_t);
  72 STATIC int      xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
  73 STATIC int      xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
  74                                         uint);
  75 STATIC uint     xfs_qm_import_flags(uint);
  76 STATIC uint     xfs_qm_export_flags(uint);
  77 STATIC uint     xfs_qm_import_qtype_flags(uint);
  78 STATIC uint     xfs_qm_export_qtype_flags(uint);
  79 STATIC void     xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  80                                         fs_disk_quota_t *);
  81
  82
  83 /*
  84  * The main distribution switch of all XFS quotactl system calls.
  85  */
  86 int
  87 xfs_qm_quotactl(
  88         struct bhv_desc *bdp,
  89         int             cmd,
  90         int             id,
  91         xfs_caddr_t     addr)
  92 {
  93         xfs_mount_t     *mp;
  94         int             error;
  95         struct vfs      *vfsp;
  96
  97         vfsp = bhvtovfs(bdp);
  98         mp = XFS_VFSTOM(vfsp);
  99
 100         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
 101
 102         /*
 103          * The following commands are valid even when quotaoff.
 104          */
 105         switch (cmd) {
 106         case Q_XQUOTARM:
 107                 /*
 108                  * Truncate quota files. quota must be off.
 109                  */
 110                 if (XFS_IS_QUOTA_ON(mp))
 111                         return XFS_ERROR(EINVAL);
 112                 if (vfsp->vfs_flag & VFS_RDONLY)
 113                         return XFS_ERROR(EROFS);
 114                 return (xfs_qm_scall_trunc_qfiles(mp,
 115                                xfs_qm_import_qtype_flags(*(uint *)addr)));
 116
 117         case Q_XGETQSTAT:
 118                 /*
 119                  * Get quota status information.
 120                  */
 121                 return (xfs_qm_scall_getqstat(mp, (fs_quota_stat_t *)addr));
 122
 123         case Q_XQUOTAON:
 124                 /*
 125                  * QUOTAON - enabling quota enforcement.
 126                  * Quota accounting must be turned on at mount time.
 127                  */
 128                 if (vfsp->vfs_flag & VFS_RDONLY)
 129                         return XFS_ERROR(EROFS);
 130                 return (xfs_qm_scall_quotaon(mp,
 131                                           xfs_qm_import_flags(*(uint *)addr)));
 132
 133         case Q_XQUOTAOFF:
 134                 if (vfsp->vfs_flag & VFS_RDONLY)
 135                         return XFS_ERROR(EROFS);
 136                 break;
 137
 138         case Q_XQUOTASYNC:
 139                 return (xfs_sync_inodes(mp, SYNC_DELWRI, 0, NULL));
 140
 141         default:
 142                 break;
 143         }
 144
 145         if (! XFS_IS_QUOTA_ON(mp))
 146                 return XFS_ERROR(ESRCH);
 147
 148         switch (cmd) {
 149         case Q_XQUOTAOFF:
 150                 if (vfsp->vfs_flag & VFS_RDONLY)
 151                         return XFS_ERROR(EROFS);
 152                 error = xfs_qm_scall_quotaoff(mp,
 153                                             xfs_qm_import_flags(*(uint *)addr),
 154                                             B_FALSE);
 155                 break;
 156
 157         case Q_XGETQUOTA:
 158                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 159                                         (fs_disk_quota_t *)addr);
 160                 break;
 161         case Q_XGETGQUOTA:
 162                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 163                                         (fs_disk_quota_t *)addr);
 164                 break;
 165         case Q_XGETPQUOTA:
 166                 error = xfs_qm_scall_getquota(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 167                                         (fs_disk_quota_t *)addr);
 168                 break;
 169
 170         case Q_XSETQLIM:
 171                 if (vfsp->vfs_flag & VFS_RDONLY)
 172                         return XFS_ERROR(EROFS);
 173                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_USER,
 174                                              (fs_disk_quota_t *)addr);
 175                 break;
 176         case Q_XSETGQLIM:
 177                 if (vfsp->vfs_flag & VFS_RDONLY)
 178                         return XFS_ERROR(EROFS);
 179                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_GROUP,
 180                                              (fs_disk_quota_t *)addr);
 181                 break;
 182         case Q_XSETPQLIM:
 183                 if (vfsp->vfs_flag & VFS_RDONLY)
 184                         return XFS_ERROR(EROFS);
 185                 error = xfs_qm_scall_setqlim(mp, (xfs_dqid_t)id, XFS_DQ_PROJ,
 186                                              (fs_disk_quota_t *)addr);
 187                 break;
 188
 189         default:
 190                 error = XFS_ERROR(EINVAL);
 191                 break;
 192         }
 193
 194         return (error);
 195 }
 196
 197 /*
 198  * Turn off quota accounting and/or enforcement for all udquots and/or
 199  * gdquots. Called only at unmount time.
 200  *
 201  * This assumes that there are no dquots of this file system cached
 202  * incore, and modifies the ondisk dquot directly. Therefore, for example,
 203  * it is an error to call this twice, without purging the cache.
 204  */
 205 STATIC int
 206 xfs_qm_scall_quotaoff(
 207         xfs_mount_t             *mp,
 208         uint                    flags,
 209         boolean_t               force)
 210 {
 211         uint                    dqtype;
 212         unsigned long   s;
 213         int                     error;
 214         uint                    inactivate_flags;
 215         xfs_qoff_logitem_t      *qoffstart;
 216         int                     nculprits;
 217
 218         if (!force && !vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 219                 return XFS_ERROR(EPERM);
 220         /*
 221          * No file system can have quotas enabled on disk but not in core.
 222          * Note that quota utilities (like quotaoff) _expect_
 223          * errno == EEXIST here.
 224          */
 225         if ((mp->m_qflags & flags) == 0)
 226                 return XFS_ERROR(EEXIST);
 227         error = 0;
 228
 229         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 230
 231         /*
 232          * We don't want to deal with two quotaoffs messing up each other,
 233          * so we're going to serialize it. quotaoff isn't exactly a performance
 234          * critical thing.
 235          * If quotaoff, then we must be dealing with the root filesystem.
 236          */
 237         ASSERT(mp->m_quotainfo);
 238         if (mp->m_quotainfo)
 239                 mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 240
 241         ASSERT(mp->m_quotainfo);
 242
 243         /*
 244          * If we're just turning off quota enforcement, change mp and go.
 245          */
 246         if ((flags & XFS_ALL_QUOTA_ACCT) == 0) {
 247                 mp->m_qflags &= ~(flags);
 248
 249                 s = XFS_SB_LOCK(mp);
 250                 mp->m_sb.sb_qflags = mp->m_qflags;
 251                 XFS_SB_UNLOCK(mp, s);
 252                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 253
 254                 /* XXX what to do if error ? Revert back to old vals incore ? */
 255                 error = xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS);
 256                 return (error);
 257         }
 258
 259         dqtype = 0;
 260         inactivate_flags = 0;
 261         /*
 262          * If accounting is off, we must turn enforcement off, clear the
 263          * quota 'CHKD' certificate to make it known that we have to
 264          * do a quotacheck the next time this quota is turned on.
 265          */
 266         if (flags & XFS_UQUOTA_ACCT) {
 267                 dqtype |= XFS_QMOPT_UQUOTA;
 268                 flags |= (XFS_UQUOTA_CHKD | XFS_UQUOTA_ENFD);
 269                 inactivate_flags |= XFS_UQUOTA_ACTIVE;
 270         }
 271         if (flags & XFS_GQUOTA_ACCT) {
 272                 dqtype |= XFS_QMOPT_GQUOTA;
 273                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 274                 inactivate_flags |= XFS_GQUOTA_ACTIVE;
 275         } else if (flags & XFS_PQUOTA_ACCT) {
 276                 dqtype |= XFS_QMOPT_PQUOTA;
 277                 flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
 278                 inactivate_flags |= XFS_PQUOTA_ACTIVE;
 279         }
 280
 281         /*
 282          * Nothing to do?  Don't complain. This happens when we're just
 283          * turning off quota enforcement.
 284          */
 285         if ((mp->m_qflags & flags) == 0) {
 286                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 287                 return (0);
 288         }
 289
 290         /*
 291          * Write the LI_QUOTAOFF log record, and do SB changes atomically,
 292          * and synchronously.
 293          */
 294         xfs_qm_log_quotaoff(mp, &qoffstart, flags);
 295
 296         /*
 297          * Next we clear the XFS_MOUNT_*DQ_ACTIVE bit(s) in the mount struct
 298          * to take care of the race between dqget and quotaoff. We don't take
 299          * any special locks to reset these bits. All processes need to check
 300          * these bits *after* taking inode lock(s) to see if the particular
 301          * quota type is in the process of being turned off. If *ACTIVE, it is
 302          * guaranteed that all dquot structures and all quotainode ptrs will all
 303          * stay valid as long as that inode is kept locked.
 304          *
 305          * There is no turning back after this.
 306          */
 307         mp->m_qflags &= ~inactivate_flags;
 308
 309         /*
 310          * Give back all the dquot reference(s) held by inodes.
 311          * Here we go thru every single incore inode in this file system, and
 312          * do a dqrele on the i_udquot/i_gdquot that it may have.
 313          * Essentially, as long as somebody has an inode locked, this guarantees
 314          * that quotas will not be turned off. This is handy because in a
 315          * transaction once we lock the inode(s) and check for quotaon, we can
 316          * depend on the quota inodes (and other things) being valid as long as
 317          * we keep the lock(s).
 318          */
 319         xfs_qm_dqrele_all_inodes(mp, flags);
 320
 321         /*
 322          * Next we make the changes in the quota flag in the mount struct.
 323          * This isn't protected by a particular lock directly, because we
 324          * don't want to take a mrlock everytime we depend on quotas being on.
 325          */
 326         mp->m_qflags &= ~(flags);
 327
 328         /*
 329          * Go through all the dquots of this file system and purge them,
 330          * according to what was turned off. We may not be able to get rid
 331          * of all dquots, because dquots can have temporary references that
 332          * are not attached to inodes. eg. xfs_setattr, xfs_create.
 333          * So, if we couldn't purge all the dquots from the filesystem,
 334          * we can't get rid of the incore data structures.
 335          */
 336         while ((nculprits = xfs_qm_dqpurge_all(mp, dqtype|XFS_QMOPT_QUOTAOFF)))
 337                 delay(10 * nculprits);
 338
 339         /*
 340          * Transactions that had started before ACTIVE state bit was cleared
 341          * could have logged many dquots, so they'd have higher LSNs than
 342          * the first QUOTAOFF log record does. If we happen to crash when
 343          * the tail of the log has gone past the QUOTAOFF record, but
 344          * before the last dquot modification, those dquots __will__
 345          * recover, and that's not good.
 346          *
 347          * So, we have QUOTAOFF start and end logitems; the start
 348          * logitem won't get overwritten until the end logitem appears...
 349          */
 350         xfs_qm_log_quotaoff_end(mp, qoffstart, flags);
 351
 352         /*
 353          * If quotas is completely disabled, close shop.
 354          */
 355         if (((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET1) ||
 356             ((flags & XFS_MOUNT_QUOTA_ALL) == XFS_MOUNT_QUOTA_SET2)) {
 357                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 358                 xfs_qm_destroy_quotainfo(mp);
 359                 return (0);
 360         }
 361
 362         /*
 363          * Release our quotainode references, and vn_purge them,
 364          * if we don't need them anymore.
 365          */
 366         if ((dqtype & XFS_QMOPT_UQUOTA) && XFS_QI_UQIP(mp)) {
 367                 XFS_PURGE_INODE(XFS_QI_UQIP(mp));
 368                 XFS_QI_UQIP(mp) = NULL;
 369         }
 370         if ((dqtype & (XFS_QMOPT_GQUOTA|XFS_QMOPT_PQUOTA)) && XFS_QI_GQIP(mp)) {
 371                 XFS_PURGE_INODE(XFS_QI_GQIP(mp));
 372                 XFS_QI_GQIP(mp) = NULL;
 373         }
 374         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 375
 376         return (error);
 377 }
 378
 379 STATIC int
 380 xfs_qm_scall_trunc_qfiles(
 381         xfs_mount_t     *mp,
 382         uint            flags)
 383 {
 384         int             error;
 385         xfs_inode_t     *qip;
 386
 387         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 388                 return XFS_ERROR(EPERM);
 389         error = 0;
 390         if (!XFS_SB_VERSION_HASQUOTA(&mp->m_sb) || flags == 0) {
 391                 qdprintk("qtrunc flags=%x m_qflags=%x\n", flags, mp->m_qflags);
 392                 return XFS_ERROR(EINVAL);
 393         }
 394
 395         if ((flags & XFS_DQ_USER) && mp->m_sb.sb_uquotino != NULLFSINO) {
 396                 error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, 0, 0, &qip, 0);
 397                 if (! error) {
 398                         (void) xfs_truncate_file(mp, qip);
 399                         VN_RELE(XFS_ITOV(qip));
 400                 }
 401         }
 402
 403         if ((flags & (XFS_DQ_GROUP|XFS_DQ_PROJ)) &&
 404             mp->m_sb.sb_gquotino != NULLFSINO) {
 405                 error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, 0, 0, &qip, 0);
 406                 if (! error) {
 407                         (void) xfs_truncate_file(mp, qip);
 408                         VN_RELE(XFS_ITOV(qip));
 409                 }
 410         }
 411
 412         return (error);
 413 }
 414
 415
 416 /*
 417  * Switch on (a given) quota enforcement for a filesystem.  This takes
 418  * effect immediately.
 419  * (Switching on quota accounting must be done at mount time.)
 420  */
 421 STATIC int
 422 xfs_qm_scall_quotaon(
 423         xfs_mount_t     *mp,
 424         uint            flags)
 425 {
 426         int             error;
 427         unsigned long   s;
 428         uint            qf;
 429         uint            accflags;
 430         __int64_t       sbflags;
 431
 432         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 433                 return XFS_ERROR(EPERM);
 434
 435         flags &= (XFS_ALL_QUOTA_ACCT | XFS_ALL_QUOTA_ENFD);
 436         /*
 437          * Switching on quota accounting must be done at mount time.
 438          */
 439         accflags = flags & XFS_ALL_QUOTA_ACCT;
 440         flags &= ~(XFS_ALL_QUOTA_ACCT);
 441
 442         sbflags = 0;
 443
 444         if (flags == 0) {
 445                 qdprintk("quotaon: zero flags, m_qflags=%x\n", mp->m_qflags);
 446                 return XFS_ERROR(EINVAL);
 447         }
 448
 449         /* No fs can turn on quotas with a delayed effect */
 450         ASSERT((flags & XFS_ALL_QUOTA_ACCT) == 0);
 451
 452         /*
 453          * Can't enforce without accounting. We check the superblock
 454          * qflags here instead of m_qflags because rootfs can have
 455          * quota acct on ondisk without m_qflags' knowing.
 456          */
 457         if (((flags & XFS_UQUOTA_ACCT) == 0 &&
 458             (mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) == 0 &&
 459             (flags & XFS_UQUOTA_ENFD))
 460             ||
 461             ((flags & XFS_PQUOTA_ACCT) == 0 &&
 462             (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
 463             (flags & XFS_OQUOTA_ENFD))
 464             ||
 465             ((flags & XFS_GQUOTA_ACCT) == 0 &&
 466             (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
 467             (flags & XFS_OQUOTA_ENFD))) {
 468                 qdprintk("Can't enforce without acct, flags=%x sbflags=%x\n",
 469                         flags, mp->m_sb.sb_qflags);
 470                 return XFS_ERROR(EINVAL);
 471         }
 472         /*
 473          * If everything's upto-date incore, then don't waste time.
 474          */
 475         if ((mp->m_qflags & flags) == flags)
 476                 return XFS_ERROR(EEXIST);
 477
 478         /*
 479          * Change sb_qflags on disk but not incore mp->qflags
 480          * if this is the root filesystem.
 481          */
 482         s = XFS_SB_LOCK(mp);
 483         qf = mp->m_sb.sb_qflags;
 484         mp->m_sb.sb_qflags = qf | flags;
 485         XFS_SB_UNLOCK(mp, s);
 486
 487         /*
 488          * There's nothing to change if it's the same.
 489          */
 490         if ((qf & flags) == flags && sbflags == 0)
 491                 return XFS_ERROR(EEXIST);
 492         sbflags |= XFS_SB_QFLAGS;
 493
 494         if ((error = xfs_qm_write_sb_changes(mp, sbflags)))
 495                 return (error);
 496         /*
 497          * If we aren't trying to switch on quota enforcement, we are done.
 498          */
 499         if  (((mp->m_sb.sb_qflags & XFS_UQUOTA_ACCT) !=
 500              (mp->m_qflags & XFS_UQUOTA_ACCT)) ||
 501              ((mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) !=
 502              (mp->m_qflags & XFS_PQUOTA_ACCT)) ||
 503              ((mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) !=
 504              (mp->m_qflags & XFS_GQUOTA_ACCT)) ||
 505             (flags & XFS_ALL_QUOTA_ENFD) == 0)
 506                 return (0);
 507
 508         if (! XFS_IS_QUOTA_RUNNING(mp))
 509                 return XFS_ERROR(ESRCH);
 510
 511         /*
 512          * Switch on quota enforcement in core.
 513          */
 514         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 515         mp->m_qflags |= (flags & XFS_ALL_QUOTA_ENFD);
 516         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 517
 518         return (0);
 519 }
 520
 521
 522 /*
 523  * Return quota status information, such as uquota-off, enforcements, etc.
 524  */
 525 STATIC int
 526 xfs_qm_scall_getqstat(
 527         xfs_mount_t     *mp,
 528         fs_quota_stat_t *out)
 529 {
 530         xfs_inode_t     *uip, *gip;
 531         boolean_t       tempuqip, tempgqip;
 532
 533         uip = gip = NULL;
 534         tempuqip = tempgqip = B_FALSE;
 535         memset(out, 0, sizeof(fs_quota_stat_t));
 536
 537         out->qs_version = FS_QSTAT_VERSION;
 538         if (! XFS_SB_VERSION_HASQUOTA(&mp->m_sb)) {
 539                 out->qs_uquota.qfs_ino = NULLFSINO;
 540                 out->qs_gquota.qfs_ino = NULLFSINO;
 541                 return (0);
 542         }
 543         out->qs_flags = (__uint16_t) xfs_qm_export_flags(mp->m_qflags &
 544                                                         (XFS_ALL_QUOTA_ACCT|
 545                                                          XFS_ALL_QUOTA_ENFD));
 546         out->qs_pad = 0;
 547         out->qs_uquota.qfs_ino = mp->m_sb.sb_uquotino;
 548         out->qs_gquota.qfs_ino = mp->m_sb.sb_gquotino;
 549
 550         if (mp->m_quotainfo) {
 551                 uip = mp->m_quotainfo->qi_uquotaip;
 552                 gip = mp->m_quotainfo->qi_gquotaip;
 553         }
 554         if (!uip && mp->m_sb.sb_uquotino != NULLFSINO) {
 555                 if (xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
 556                                         0, 0, &uip, 0) == 0)
 557                         tempuqip = B_TRUE;
 558         }
 559         if (!gip && mp->m_sb.sb_gquotino != NULLFSINO) {
 560                 if (xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
 561                                         0, 0, &gip, 0) == 0)
 562                         tempgqip = B_TRUE;
 563         }
 564         if (uip) {
 565                 out->qs_uquota.qfs_nblks = uip->i_d.di_nblocks;
 566                 out->qs_uquota.qfs_nextents = uip->i_d.di_nextents;
 567                 if (tempuqip)
 568                         VN_RELE(XFS_ITOV(uip));
 569         }
 570         if (gip) {
 571                 out->qs_gquota.qfs_nblks = gip->i_d.di_nblocks;
 572                 out->qs_gquota.qfs_nextents = gip->i_d.di_nextents;
 573                 if (tempgqip)
 574                         VN_RELE(XFS_ITOV(gip));
 575         }
 576         if (mp->m_quotainfo) {
 577                 out->qs_incoredqs = XFS_QI_MPLNDQUOTS(mp);
 578                 out->qs_btimelimit = XFS_QI_BTIMELIMIT(mp);
 579                 out->qs_itimelimit = XFS_QI_ITIMELIMIT(mp);
 580                 out->qs_rtbtimelimit = XFS_QI_RTBTIMELIMIT(mp);
 581                 out->qs_bwarnlimit = XFS_QI_BWARNLIMIT(mp);
 582                 out->qs_iwarnlimit = XFS_QI_IWARNLIMIT(mp);
 583         }
 584         return (0);
 585 }
 586
 587 /*
 588  * Adjust quota limits, and start/stop timers accordingly.
 589  */
 590 STATIC int
 591 xfs_qm_scall_setqlim(
 592         xfs_mount_t             *mp,
 593         xfs_dqid_t              id,
 594         uint                    type,
 595         fs_disk_quota_t         *newlim)
 596 {
 597         xfs_disk_dquot_t        *ddq;
 598         xfs_dquot_t             *dqp;
 599         xfs_trans_t             *tp;
 600         int                     error;
 601         xfs_qcnt_t              hard, soft;
 602
 603         if (!vx_capable(CAP_SYS_ADMIN, VXC_QUOTA_CTL))
 604                 return XFS_ERROR(EPERM);
 605
 606         if ((newlim->d_fieldmask &
 607             (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
 608                 return (0);
 609
 610         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
 611         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
 612                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 613                 xfs_trans_cancel(tp, 0);
 614                 return (error);
 615         }
 616
 617         /*
 618          * We don't want to race with a quotaoff so take the quotaoff lock.
 619          * (We don't hold an inode lock, so there's nothing else to stop
 620          * a quotaoff from happening). (XXXThis doesn't currently happen
 621          * because we take the vfslock before calling xfs_qm_sysent).
 622          */
 623         mutex_lock(&(XFS_QI_QOFFLOCK(mp)));
 624
 625         /*
 626          * Get the dquot (locked), and join it to the transaction.
 627          * Allocate the dquot if this doesn't exist.
 628          */
 629         if ((error = xfs_qm_dqget(mp, NULL, id, type, XFS_QMOPT_DQALLOC, &dqp))) {
 630                 xfs_trans_cancel(tp, XFS_TRANS_ABORT);
 631                 mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 632                 ASSERT(error != ENOENT);
 633                 return (error);
 634         }
 635         xfs_dqtrace_entry(dqp, "Q_SETQLIM: AFT DQGET");
 636         xfs_trans_dqjoin(tp, dqp);
 637         ddq = &dqp->q_core;
 638
 639         /*
 640          * Make sure that hardlimits are >= soft limits before changing.
 641          */
 642         hard = (newlim->d_fieldmask & FS_DQ_BHARD) ?
 643                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_hardlimit) :
 644                         be64_to_cpu(ddq->d_blk_hardlimit);
 645         soft = (newlim->d_fieldmask & FS_DQ_BSOFT) ?
 646                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_blk_softlimit) :
 647                         be64_to_cpu(ddq->d_blk_softlimit);
 648         if (hard == 0 || hard >= soft) {
 649                 ddq->d_blk_hardlimit = cpu_to_be64(hard);
 650                 ddq->d_blk_softlimit = cpu_to_be64(soft);
 651                 if (id == 0) {
 652                         mp->m_quotainfo->qi_bhardlimit = hard;
 653                         mp->m_quotainfo->qi_bsoftlimit = soft;
 654                 }
 655         } else {
 656                 qdprintk("blkhard %Ld < blksoft %Ld\n", hard, soft);
 657         }
 658         hard = (newlim->d_fieldmask & FS_DQ_RTBHARD) ?
 659                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_hardlimit) :
 660                         be64_to_cpu(ddq->d_rtb_hardlimit);
 661         soft = (newlim->d_fieldmask & FS_DQ_RTBSOFT) ?
 662                 (xfs_qcnt_t) XFS_BB_TO_FSB(mp, newlim->d_rtb_softlimit) :
 663                         be64_to_cpu(ddq->d_rtb_softlimit);
 664         if (hard == 0 || hard >= soft) {
 665                 ddq->d_rtb_hardlimit = cpu_to_be64(hard);
 666                 ddq->d_rtb_softlimit = cpu_to_be64(soft);
 667                 if (id == 0) {
 668                         mp->m_quotainfo->qi_rtbhardlimit = hard;
 669                         mp->m_quotainfo->qi_rtbsoftlimit = soft;
 670                 }
 671         } else {
 672                 qdprintk("rtbhard %Ld < rtbsoft %Ld\n", hard, soft);
 673         }
 674
 675         hard = (newlim->d_fieldmask & FS_DQ_IHARD) ?
 676                 (xfs_qcnt_t) newlim->d_ino_hardlimit :
 677                         be64_to_cpu(ddq->d_ino_hardlimit);
 678         soft = (newlim->d_fieldmask & FS_DQ_ISOFT) ?
 679                 (xfs_qcnt_t) newlim->d_ino_softlimit :
 680                         be64_to_cpu(ddq->d_ino_softlimit);
 681         if (hard == 0 || hard >= soft) {
 682                 ddq->d_ino_hardlimit = cpu_to_be64(hard);
 683                 ddq->d_ino_softlimit = cpu_to_be64(soft);
 684                 if (id == 0) {
 685                         mp->m_quotainfo->qi_ihardlimit = hard;
 686                         mp->m_quotainfo->qi_isoftlimit = soft;
 687                 }
 688         } else {
 689                 qdprintk("ihard %Ld < isoft %Ld\n", hard, soft);
 690         }
 691
 692         /*
 693          * Update warnings counter(s) if requested
 694          */
 695         if (newlim->d_fieldmask & FS_DQ_BWARNS)
 696                 ddq->d_bwarns = cpu_to_be16(newlim->d_bwarns);
 697         if (newlim->d_fieldmask & FS_DQ_IWARNS)
 698                 ddq->d_iwarns = cpu_to_be16(newlim->d_iwarns);
 699         if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 700                 ddq->d_rtbwarns = cpu_to_be16(newlim->d_rtbwarns);
 701
 702         if (id == 0) {
 703                 /*
 704                  * Timelimits for the super user set the relative time
 705                  * the other users can be over quota for this file system.
 706                  * If it is zero a default is used.  Ditto for the default
 707                  * soft and hard limit values (already done, above), and
 708                  * for warnings.
 709                  */
 710                 if (newlim->d_fieldmask & FS_DQ_BTIMER) {
 711                         mp->m_quotainfo->qi_btimelimit = newlim->d_btimer;
 712                         ddq->d_btimer = cpu_to_be32(newlim->d_btimer);
 713                 }
 714                 if (newlim->d_fieldmask & FS_DQ_ITIMER) {
 715                         mp->m_quotainfo->qi_itimelimit = newlim->d_itimer;
 716                         ddq->d_itimer = cpu_to_be32(newlim->d_itimer);
 717                 }
 718                 if (newlim->d_fieldmask & FS_DQ_RTBTIMER) {
 719                         mp->m_quotainfo->qi_rtbtimelimit = newlim->d_rtbtimer;
 720                         ddq->d_rtbtimer = cpu_to_be32(newlim->d_rtbtimer);
 721                 }
 722                 if (newlim->d_fieldmask & FS_DQ_BWARNS)
 723                         mp->m_quotainfo->qi_bwarnlimit = newlim->d_bwarns;
 724                 if (newlim->d_fieldmask & FS_DQ_IWARNS)
 725                         mp->m_quotainfo->qi_iwarnlimit = newlim->d_iwarns;
 726                 if (newlim->d_fieldmask & FS_DQ_RTBWARNS)
 727                         mp->m_quotainfo->qi_rtbwarnlimit = newlim->d_rtbwarns;
 728         } else {
 729                 /*
 730                  * If the user is now over quota, start the timelimit.
 731                  * The user will not be 'warned'.
 732                  * Note that we keep the timers ticking, whether enforcement
 733                  * is on or off. We don't really want to bother with iterating
 734                  * over all ondisk dquots and turning the timers on/off.
 735                  */
 736                 xfs_qm_adjust_dqtimers(mp, ddq);
 737         }
 738         dqp->dq_flags |= XFS_DQ_DIRTY;
 739         xfs_trans_log_dquot(tp, dqp);
 740
 741         xfs_dqtrace_entry(dqp, "Q_SETQLIM: COMMIT");
 742         xfs_trans_commit(tp, 0, NULL);
 743         xfs_qm_dqprint(dqp);
 744         xfs_qm_dqrele(dqp);
 745         mutex_unlock(&(XFS_QI_QOFFLOCK(mp)));
 746
 747         return (0);
 748 }
 749
 750 STATIC int
 751 xfs_qm_scall_getquota(
 752         xfs_mount_t     *mp,
 753         xfs_dqid_t      id,
 754         uint            type,
 755         fs_disk_quota_t *out)
 756 {
 757         xfs_dquot_t     *dqp;
 758         int             error;
 759
 760         /*
 761          * Try to get the dquot. We don't want it allocated on disk, so
 762          * we aren't passing the XFS_QMOPT_DOALLOC flag. If it doesn't
 763          * exist, we'll get ENOENT back.
 764          */
 765         if ((error = xfs_qm_dqget(mp, NULL, id, type, 0, &dqp))) {
 766                 return (error);
 767         }
 768
 769         xfs_dqtrace_entry(dqp, "Q_GETQUOTA SUCCESS");
 770         /*
 771          * If everything's NULL, this dquot doesn't quite exist as far as
 772          * our utility programs are concerned.
 773          */
 774         if (XFS_IS_DQUOT_UNINITIALIZED(dqp)) {
 775                 xfs_qm_dqput(dqp);
 776                 return XFS_ERROR(ENOENT);
 777         }
 778         /* xfs_qm_dqprint(dqp); */
 779         /*
 780          * Convert the disk dquot to the exportable format
 781          */
 782         xfs_qm_export_dquot(mp, &dqp->q_core, out);
 783         xfs_qm_dqput(dqp);
 784         return (error ? XFS_ERROR(EFAULT) : 0);
 785 }
 786
 787
 788 STATIC int
 789 xfs_qm_log_quotaoff_end(
 790         xfs_mount_t             *mp,
 791         xfs_qoff_logitem_t      *startqoff,
 792         uint                    flags)
 793 {
 794         xfs_trans_t             *tp;
 795         int                     error;
 796         xfs_qoff_logitem_t      *qoffi;
 797
 798         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF_END);
 799
 800         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_qoff_logitem_t) * 2,
 801                                       0, 0, XFS_DEFAULT_LOG_COUNT))) {
 802                 xfs_trans_cancel(tp, 0);
 803                 return (error);
 804         }
 805
 806         qoffi = xfs_trans_get_qoff_item(tp, startqoff,
 807                                         flags & XFS_ALL_QUOTA_ACCT);
 808         xfs_trans_log_quotaoff_item(tp, qoffi);
 809
 810         /*
 811          * We have to make sure that the transaction is secure on disk before we
 812          * return and actually stop quota accounting. So, make it synchronous.
 813          * We don't care about quotoff's performance.
 814          */
 815         xfs_trans_set_sync(tp);
 816         error = xfs_trans_commit(tp, 0, NULL);
 817         return (error);
 818 }
 819
 820
 821 STATIC int
 822 xfs_qm_log_quotaoff(
 823         xfs_mount_t            *mp,
 824         xfs_qoff_logitem_t     **qoffstartp,
 825         uint                   flags)
 826 {
 827         xfs_trans_t            *tp;
 828         int                     error;
 829         unsigned long   s;
 830         xfs_qoff_logitem_t     *qoffi=NULL;
 831         uint                    oldsbqflag=0;
 832
 833         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QUOTAOFF);
 834         if ((error = xfs_trans_reserve(tp, 0,
 835                                       sizeof(xfs_qoff_logitem_t) * 2 +
 836                                       mp->m_sb.sb_sectsize + 128,
 837                                       0,
 838                                       0,
 839                                       XFS_DEFAULT_LOG_COUNT))) {
 840                 goto error0;
 841         }
 842
 843         qoffi = xfs_trans_get_qoff_item(tp, NULL, flags & XFS_ALL_QUOTA_ACCT);
 844         xfs_trans_log_quotaoff_item(tp, qoffi);
 845
 846         s = XFS_SB_LOCK(mp);
 847         oldsbqflag = mp->m_sb.sb_qflags;
 848         mp->m_sb.sb_qflags = (mp->m_qflags & ~(flags)) & XFS_MOUNT_QUOTA_ALL;
 849         XFS_SB_UNLOCK(mp, s);
 850
 851         xfs_mod_sb(tp, XFS_SB_QFLAGS);
 852
 853         /*
 854          * We have to make sure that the transaction is secure on disk before we
 855          * return and actually stop quota accounting. So, make it synchronous.
 856          * We don't care about quotoff's performance.
 857          */
 858         xfs_trans_set_sync(tp);
 859         error = xfs_trans_commit(tp, 0, NULL);
 860
 861 error0:
 862         if (error) {
 863                 xfs_trans_cancel(tp, 0);
 864                 /*
 865                  * No one else is modifying sb_qflags, so this is OK.
 866                  * We still hold the quotaofflock.
 867                  */
 868                 s = XFS_SB_LOCK(mp);
 869                 mp->m_sb.sb_qflags = oldsbqflag;
 870                 XFS_SB_UNLOCK(mp, s);
 871         }
 872         *qoffstartp = qoffi;
 873         return (error);
 874 }
 875
 876
 877 /*
 878  * Translate an internal style on-disk-dquot to the exportable format.
 879  * The main differences are that the counters/limits are all in Basic
 880  * Blocks (BBs) instead of the internal FSBs, and all on-disk data has
 881  * to be converted to the native endianness.
 882  */
 883 STATIC void
 884 xfs_qm_export_dquot(
 885         xfs_mount_t             *mp,
 886         xfs_disk_dquot_t        *src,
 887         struct fs_disk_quota    *dst)
 888 {
 889         memset(dst, 0, sizeof(*dst));
 890         dst->d_version = FS_DQUOT_VERSION;  /* different from src->d_version */
 891         dst->d_flags = xfs_qm_export_qtype_flags(src->d_flags);
 892         dst->d_id = be32_to_cpu(src->d_id);
 893         dst->d_blk_hardlimit =
 894                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_hardlimit));
 895         dst->d_blk_softlimit =
 896                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_blk_softlimit));
 897         dst->d_ino_hardlimit = be64_to_cpu(src->d_ino_hardlimit);
 898         dst->d_ino_softlimit = be64_to_cpu(src->d_ino_softlimit);
 899         dst->d_bcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_bcount));
 900         dst->d_icount = be64_to_cpu(src->d_icount);
 901         dst->d_btimer = be32_to_cpu(src->d_btimer);
 902         dst->d_itimer = be32_to_cpu(src->d_itimer);
 903         dst->d_iwarns = be16_to_cpu(src->d_iwarns);
 904         dst->d_bwarns = be16_to_cpu(src->d_bwarns);
 905         dst->d_rtb_hardlimit =
 906                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_hardlimit));
 907         dst->d_rtb_softlimit =
 908                 XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtb_softlimit));
 909         dst->d_rtbcount = XFS_FSB_TO_BB(mp, be64_to_cpu(src->d_rtbcount));
 910         dst->d_rtbtimer = be32_to_cpu(src->d_rtbtimer);
 911         dst->d_rtbwarns = be16_to_cpu(src->d_rtbwarns);
 912
 913         /*
 914          * Internally, we don't reset all the timers when quota enforcement
 915          * gets turned off. No need to confuse the user level code,
 916          * so return zeroes in that case.
 917          */
 918         if (! XFS_IS_QUOTA_ENFORCED(mp)) {
 919                 dst->d_btimer = 0;
 920                 dst->d_itimer = 0;
 921                 dst->d_rtbtimer = 0;
 922         }
 923
 924 #ifdef DEBUG
 925         if (XFS_IS_QUOTA_ENFORCED(mp) && dst->d_id != 0) {
 926                 if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
 927                     (dst->d_blk_softlimit > 0)) {
 928                         ASSERT(dst->d_btimer != 0);
 929                 }
 930                 if (((int) dst->d_icount >= (int) dst->d_ino_softlimit) &&
 931                     (dst->d_ino_softlimit > 0)) {
 932                         ASSERT(dst->d_itimer != 0);
 933                 }
 934         }
 935 #endif
 936 }
 937
 938 STATIC uint
 939 xfs_qm_import_qtype_flags(
 940         uint            uflags)
 941 {
 942         uint            oflags = 0;
 943
 944         /*
 945          * Can't be more than one, or none.
 946          */
 947         if (((uflags & (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ==
 948                         (XFS_GROUP_QUOTA | XFS_USER_QUOTA)) ||
 949             ((uflags & (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ==
 950                         (XFS_GROUP_QUOTA | XFS_PROJ_QUOTA)) ||
 951             ((uflags & (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ==
 952                         (XFS_USER_QUOTA | XFS_PROJ_QUOTA)) ||
 953             ((uflags & (XFS_GROUP_QUOTA|XFS_USER_QUOTA|XFS_PROJ_QUOTA)) == 0))
 954                 return (0);
 955
 956         oflags |= (uflags & XFS_USER_QUOTA) ? XFS_DQ_USER : 0;
 957         oflags |= (uflags & XFS_PROJ_QUOTA) ? XFS_DQ_PROJ : 0;
 958         oflags |= (uflags & XFS_GROUP_QUOTA) ? XFS_DQ_GROUP: 0;
 959         return oflags;
 960 }
 961
 962 STATIC uint
 963 xfs_qm_export_qtype_flags(
 964         uint flags)
 965 {
 966         /*
 967          * Can't be more than one, or none.
 968          */
 969         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_USER_QUOTA)) !=
 970                 (XFS_PROJ_QUOTA | XFS_USER_QUOTA));
 971         ASSERT((flags & (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA)) !=
 972                 (XFS_PROJ_QUOTA | XFS_GROUP_QUOTA));
 973         ASSERT((flags & (XFS_USER_QUOTA | XFS_GROUP_QUOTA)) !=
 974                 (XFS_USER_QUOTA | XFS_GROUP_QUOTA));
 975         ASSERT((flags & (XFS_PROJ_QUOTA|XFS_USER_QUOTA|XFS_GROUP_QUOTA)) != 0);
 976
 977         return (flags & XFS_DQ_USER) ?
 978                 XFS_USER_QUOTA : (flags & XFS_DQ_PROJ) ?
 979                         XFS_PROJ_QUOTA : XFS_GROUP_QUOTA;
 980 }
 981
 982 STATIC uint
 983 xfs_qm_import_flags(
 984         uint uflags)
 985 {
 986         uint flags = 0;
 987
 988         if (uflags & XFS_QUOTA_UDQ_ACCT)
 989                 flags |= XFS_UQUOTA_ACCT;
 990         if (uflags & XFS_QUOTA_PDQ_ACCT)
 991                 flags |= XFS_PQUOTA_ACCT;
 992         if (uflags & XFS_QUOTA_GDQ_ACCT)
 993                 flags |= XFS_GQUOTA_ACCT;
 994         if (uflags & XFS_QUOTA_UDQ_ENFD)
 995                 flags |= XFS_UQUOTA_ENFD;
 996         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
 997                 flags |= XFS_OQUOTA_ENFD;
 998         return (flags);
 999 }
1000
1001
1002 STATIC uint
1003 xfs_qm_export_flags(
1004         uint flags)
1005 {
1006         uint uflags;
1007
1008         uflags = 0;
1009         if (flags & XFS_UQUOTA_ACCT)
1010                 uflags |= XFS_QUOTA_UDQ_ACCT;
1011         if (flags & XFS_PQUOTA_ACCT)
1012                 uflags |= XFS_QUOTA_PDQ_ACCT;
1013         if (flags & XFS_GQUOTA_ACCT)
1014                 uflags |= XFS_QUOTA_GDQ_ACCT;
1015         if (flags & XFS_UQUOTA_ENFD)
1016                 uflags |= XFS_QUOTA_UDQ_ENFD;
1017         if (flags & (XFS_OQUOTA_ENFD)) {
1018                 uflags |= (flags & XFS_GQUOTA_ACCT) ?
1019                         XFS_QUOTA_GDQ_ENFD : XFS_QUOTA_PDQ_ENFD;
1020         }
1021         return (uflags);
1022 }
1023
1024
1025 /*
1026  * Go thru all the inodes in the file system, releasing their dquots.
1027  * Note that the mount structure gets modified to indicate that quotas are off
1028  * AFTER this, in the case of quotaoff. This also gets called from
1029  * xfs_rootumount.
1030  */
1031 void
1032 xfs_qm_dqrele_all_inodes(
1033         struct xfs_mount *mp,
1034         uint             flags)
1035 {
1036         xfs_inode_t     *ip, *topino;
1037         uint            ireclaims;
1038         vnode_t         *vp;
1039         boolean_t       vnode_refd;
1040
1041         ASSERT(mp->m_quotainfo);
1042
1043         XFS_MOUNT_ILOCK(mp);
1044 again:
1045         ip = mp->m_inodes;
1046         if (ip == NULL) {
1047                 XFS_MOUNT_IUNLOCK(mp);
1048                 return;
1049         }
1050         do {
1051                 /* Skip markers inserted by xfs_sync */
1052                 if (ip->i_mount == NULL) {
1053                         ip = ip->i_mnext;
1054                         continue;
1055                 }
1056                 /* Root inode, rbmip and rsumip have associated blocks */
1057                 if (ip == XFS_QI_UQIP(mp) || ip == XFS_QI_GQIP(mp)) {
1058                         ASSERT(ip->i_udquot == NULL);
1059                         ASSERT(ip->i_gdquot == NULL);
1060                         ip = ip->i_mnext;
1061                         continue;
1062                 }
1063                 vp = XFS_ITOV_NULL(ip);
1064                 if (!vp) {
1065                         ASSERT(ip->i_udquot == NULL);
1066                         ASSERT(ip->i_gdquot == NULL);
1067                         ip = ip->i_mnext;
1068                         continue;
1069                 }
1070                 vnode_refd = B_FALSE;
1071                 if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) {
1072                         ireclaims = mp->m_ireclaims;
1073                         topino = mp->m_inodes;
1074                         vp = vn_grab(vp);
1075                         if (!vp)
1076                                 goto again;
1077
1078                         XFS_MOUNT_IUNLOCK(mp);
1079                         /* XXX restart limit ? */
1080                         xfs_ilock(ip, XFS_ILOCK_EXCL);
1081                         vnode_refd = B_TRUE;
1082                 } else {
1083                         ireclaims = mp->m_ireclaims;
1084                         topino = mp->m_inodes;
1085                         XFS_MOUNT_IUNLOCK(mp);
1086                 }
1087
1088                 /*
1089                  * We don't keep the mountlock across the dqrele() call,
1090                  * since it can take a while..
1091                  */
1092                 if ((flags & XFS_UQUOTA_ACCT) && ip->i_udquot) {
1093                         xfs_qm_dqrele(ip->i_udquot);
1094                         ip->i_udquot = NULL;
1095                 }
1096                 if (flags & (XFS_PQUOTA_ACCT|XFS_GQUOTA_ACCT) && ip->i_gdquot) {
1097                         xfs_qm_dqrele(ip->i_gdquot);
1098                         ip->i_gdquot = NULL;
1099                 }
1100                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1101                 /*
1102                  * Wait until we've dropped the ilock and mountlock to
1103                  * do the vn_rele. Or be condemned to an eternity in the
1104                  * inactive code in hell.
1105                  */
1106                 if (vnode_refd)
1107                         VN_RELE(vp);
1108                 XFS_MOUNT_ILOCK(mp);
1109                 /*
1110                  * If an inode was inserted or removed, we gotta
1111                  * start over again.
1112                  */
1113                 if (topino != mp->m_inodes || mp->m_ireclaims != ireclaims) {
1114                         /* XXX use a sentinel */
1115                         goto again;
1116                 }
1117                 ip = ip->i_mnext;
1118         } while (ip != mp->m_inodes);
1119
1120         XFS_MOUNT_IUNLOCK(mp);
1121 }
1122
1123 /*------------------------------------------------------------------------*/
1124 #ifdef DEBUG
1125 /*
1126  * This contains all the test functions for XFS disk quotas.
1127  * Currently it does a quota accounting check. ie. it walks through
1128  * all inodes in the file system, calculating the dquot accounting fields,
1129  * and prints out any inconsistencies.
1130  */
1131 xfs_dqhash_t *qmtest_udqtab;
1132 xfs_dqhash_t *qmtest_gdqtab;
1133 int           qmtest_hashmask;
1134 int           qmtest_nfails;
1135 mutex_t       qcheck_lock;
1136
1137 #define DQTEST_HASHVAL(mp, id) (((__psunsigned_t)(mp) + \
1138                                  (__psunsigned_t)(id)) & \
1139                                 (qmtest_hashmask - 1))
1140
1141 #define DQTEST_HASH(mp, id, type)   ((type & XFS_DQ_USER) ? \
1142                                      (qmtest_udqtab + \
1143                                       DQTEST_HASHVAL(mp, id)) : \
1144                                      (qmtest_gdqtab + \
1145                                       DQTEST_HASHVAL(mp, id)))
1146
1147 #define DQTEST_LIST_PRINT(l, NXT, title) \
1148 { \
1149           xfs_dqtest_t  *dqp; int i = 0;\
1150           cmn_err(CE_DEBUG, "%s (#%d)", title, (int) (l)->qh_nelems); \
1151           for (dqp = (xfs_dqtest_t *)(l)->qh_next; dqp != NULL; \
1152                dqp = (xfs_dqtest_t *)dqp->NXT) { \
1153                 cmn_err(CE_DEBUG, "  %d. \"%d (%s)\"  bcnt = %d, icnt = %d", \
1154                          ++i, dqp->d_id, DQFLAGTO_TYPESTR(dqp),      \
1155                          dqp->d_bcount, dqp->d_icount); } \
1156 }
1157
1158 typedef struct dqtest {
1159         xfs_dqmarker_t  q_lists;
1160         xfs_dqhash_t    *q_hash;        /* the hashchain header */
1161         xfs_mount_t     *q_mount;       /* filesystem this relates to */
1162         xfs_dqid_t      d_id;           /* user id or group id */
1163         xfs_qcnt_t      d_bcount;       /* # disk blocks owned by the user */
1164         xfs_qcnt_t      d_icount;       /* # inodes owned by the user */
1165 } xfs_dqtest_t;
1166
1167 STATIC void
1168 xfs_qm_hashinsert(xfs_dqhash_t *h, xfs_dqtest_t *dqp)
1169 {
1170         xfs_dquot_t *d;
1171         if (((d) = (h)->qh_next))
1172                 (d)->HL_PREVP = &((dqp)->HL_NEXT);
1173         (dqp)->HL_NEXT = d;
1174         (dqp)->HL_PREVP = &((h)->qh_next);
1175         (h)->qh_next = (xfs_dquot_t *)dqp;
1176         (h)->qh_version++;
1177         (h)->qh_nelems++;
1178 }
1179 STATIC void
1180 xfs_qm_dqtest_print(
1181         xfs_dqtest_t    *d)
1182 {
1183         cmn_err(CE_DEBUG, "-----------DQTEST DQUOT----------------");
1184         cmn_err(CE_DEBUG, "---- dquot ID = %d", d->d_id);
1185         cmn_err(CE_DEBUG, "---- fs       = 0x%p", d->q_mount);
1186         cmn_err(CE_DEBUG, "---- bcount   = %Lu (0x%x)",
1187                 d->d_bcount, (int)d->d_bcount);
1188         cmn_err(CE_DEBUG, "---- icount   = %Lu (0x%x)",
1189                 d->d_icount, (int)d->d_icount);
1190         cmn_err(CE_DEBUG, "---------------------------");
1191 }
1192
1193 STATIC void
1194 xfs_qm_dqtest_failed(
1195         xfs_dqtest_t    *d,
1196         xfs_dquot_t     *dqp,
1197         char            *reason,
1198         xfs_qcnt_t      a,
1199         xfs_qcnt_t      b,
1200         int             error)
1201 {
1202         qmtest_nfails++;
1203         if (error)
1204                 cmn_err(CE_DEBUG, "quotacheck failed id=%d, err=%d\nreason: %s",
1205                        d->d_id, error, reason);
1206         else
1207                 cmn_err(CE_DEBUG, "quotacheck failed id=%d (%s) [%d != %d]",
1208                        d->d_id, reason, (int)a, (int)b);
1209         xfs_qm_dqtest_print(d);
1210         if (dqp)
1211                 xfs_qm_dqprint(dqp);
1212 }
1213
1214 STATIC int
1215 xfs_dqtest_cmp2(
1216         xfs_dqtest_t    *d,
1217         xfs_dquot_t     *dqp)
1218 {
1219         int err = 0;
1220         if (be64_to_cpu(dqp->q_core.d_icount) != d->d_icount) {
1221                 xfs_qm_dqtest_failed(d, dqp, "icount mismatch",
1222                         be64_to_cpu(dqp->q_core.d_icount),
1223                         d->d_icount, 0);
1224                 err++;
1225         }
1226         if (be64_to_cpu(dqp->q_core.d_bcount) != d->d_bcount) {
1227                 xfs_qm_dqtest_failed(d, dqp, "bcount mismatch",
1228                         be64_to_cpu(dqp->q_core.d_bcount),
1229                         d->d_bcount, 0);
1230                 err++;
1231         }
1232         if (dqp->q_core.d_blk_softlimit &&
1233             be64_to_cpu(dqp->q_core.d_bcount) >=
1234             be64_to_cpu(dqp->q_core.d_blk_softlimit)) {
1235                 if (!dqp->q_core.d_btimer && dqp->q_core.d_id) {
1236                         cmn_err(CE_DEBUG,
1237                                 "%d [%s] [0x%p] BLK TIMER NOT STARTED",
1238                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1239                         err++;
1240                 }
1241         }
1242         if (dqp->q_core.d_ino_softlimit &&
1243             be64_to_cpu(dqp->q_core.d_icount) >=
1244             be64_to_cpu(dqp->q_core.d_ino_softlimit)) {
1245                 if (!dqp->q_core.d_itimer && dqp->q_core.d_id) {
1246                         cmn_err(CE_DEBUG,
1247                                 "%d [%s] [0x%p] INO TIMER NOT STARTED",
1248                                 d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1249                         err++;
1250                 }
1251         }
1252 #ifdef QUOTADEBUG
1253         if (!err) {
1254                 cmn_err(CE_DEBUG, "%d [%s] [0x%p] qchecked",
1255                         d->d_id, DQFLAGTO_TYPESTR(d), d->q_mount);
1256         }
1257 #endif
1258         return (err);
1259 }
1260
1261 STATIC void
1262 xfs_dqtest_cmp(
1263         xfs_dqtest_t    *d)
1264 {
1265         xfs_dquot_t     *dqp;
1266         int             error;
1267
1268         /* xfs_qm_dqtest_print(d); */
1269         if ((error = xfs_qm_dqget(d->q_mount, NULL, d->d_id, d->dq_flags, 0,
1270                                  &dqp))) {
1271                 xfs_qm_dqtest_failed(d, NULL, "dqget failed", 0, 0, error);
1272                 return;
1273         }
1274         xfs_dqtest_cmp2(d, dqp);
1275         xfs_qm_dqput(dqp);
1276 }
1277
1278 STATIC int
1279 xfs_qm_internalqcheck_dqget(
1280         xfs_mount_t     *mp,
1281         xfs_dqid_t      id,
1282         uint            type,
1283         xfs_dqtest_t    **O_dq)
1284 {
1285         xfs_dqtest_t    *d;
1286         xfs_dqhash_t    *h;
1287
1288         h = DQTEST_HASH(mp, id, type);
1289         for (d = (xfs_dqtest_t *) h->qh_next; d != NULL;
1290              d = (xfs_dqtest_t *) d->HL_NEXT) {
1291                 /* DQTEST_LIST_PRINT(h, HL_NEXT, "@@@@@ dqtestlist @@@@@"); */
1292                 if (d->d_id == id && mp == d->q_mount) {
1293                         *O_dq = d;
1294                         return (0);
1295                 }
1296         }
1297         d = kmem_zalloc(sizeof(xfs_dqtest_t), KM_SLEEP);
1298         d->dq_flags = type;
1299         d->d_id = id;
1300         d->q_mount = mp;
1301         d->q_hash = h;
1302         xfs_qm_hashinsert(h, d);
1303         *O_dq = d;
1304         return (0);
1305 }
1306
1307 STATIC void
1308 xfs_qm_internalqcheck_get_dquots(
1309         xfs_mount_t     *mp,
1310         xfs_dqid_t      uid,
1311         xfs_dqid_t      projid,
1312         xfs_dqid_t      gid,
1313         xfs_dqtest_t    **ud,
1314         xfs_dqtest_t    **gd)
1315 {
1316         if (XFS_IS_UQUOTA_ON(mp))
1317                 xfs_qm_internalqcheck_dqget(mp, uid, XFS_DQ_USER, ud);
1318         if (XFS_IS_GQUOTA_ON(mp))
1319                 xfs_qm_internalqcheck_dqget(mp, gid, XFS_DQ_GROUP, gd);
1320         else if (XFS_IS_PQUOTA_ON(mp))
1321                 xfs_qm_internalqcheck_dqget(mp, projid, XFS_DQ_PROJ, gd);
1322 }
1323
1324
1325 STATIC void
1326 xfs_qm_internalqcheck_dqadjust(
1327         xfs_inode_t             *ip,
1328         xfs_dqtest_t            *d)
1329 {
1330         d->d_icount++;
1331         d->d_bcount += (xfs_qcnt_t)ip->i_d.di_nblocks;
1332 }
1333
1334 STATIC int
1335 xfs_qm_internalqcheck_adjust(
1336         xfs_mount_t     *mp,            /* mount point for filesystem */
1337         xfs_ino_t       ino,            /* inode number to get data for */
1338         void            __user *buffer, /* not used */
1339         int             ubsize,         /* not used */
1340         void            *private_data,  /* not used */
1341         xfs_daddr_t     bno,            /* starting block of inode cluster */
1342         int             *ubused,        /* not used */
1343         void            *dip,           /* not used */
1344         int             *res)           /* bulkstat result code */
1345 {
1346         xfs_inode_t             *ip;
1347         xfs_dqtest_t            *ud, *gd;
1348         uint                    lock_flags;
1349         boolean_t               ipreleased;
1350         int                     error;
1351
1352         ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1353
1354         if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
1355                 *res = BULKSTAT_RV_NOTHING;
1356                 qdprintk("internalqcheck: ino=%llu, uqino=%llu, gqino=%llu\n",
1357                         (unsigned long long) ino,
1358                         (unsigned long long) mp->m_sb.sb_uquotino,
1359                         (unsigned long long) mp->m_sb.sb_gquotino);
1360                 return XFS_ERROR(EINVAL);
1361         }
1362         ipreleased = B_FALSE;
1363  again:
1364         lock_flags = XFS_ILOCK_SHARED;
1365         if ((error = xfs_iget(mp, NULL, ino, 0, lock_flags, &ip, bno))) {
1366                 *res = BULKSTAT_RV_NOTHING;
1367                 return (error);
1368         }
1369
1370         if (ip->i_d.di_mode == 0) {
1371                 xfs_iput_new(ip, lock_flags);
1372                 *res = BULKSTAT_RV_NOTHING;
1373                 return XFS_ERROR(ENOENT);
1374         }
1375
1376         /*
1377          * This inode can have blocks after eof which can get released
1378          * when we send it to inactive. Since we don't check the dquot
1379          * until the after all our calculations are done, we must get rid
1380          * of those now.
1381          */
1382         if (! ipreleased) {
1383                 xfs_iput(ip, lock_flags);
1384                 ipreleased = B_TRUE;
1385                 goto again;
1386         }
1387         xfs_qm_internalqcheck_get_dquots(mp,
1388                                         (xfs_dqid_t) ip->i_d.di_uid,
1389                                         (xfs_dqid_t) ip->i_d.di_projid,
1390                                         (xfs_dqid_t) ip->i_d.di_gid,
1391                                         &ud, &gd);
1392         if (XFS_IS_UQUOTA_ON(mp)) {
1393                 ASSERT(ud);
1394                 xfs_qm_internalqcheck_dqadjust(ip, ud);
1395         }
1396         if (XFS_IS_OQUOTA_ON(mp)) {
1397                 ASSERT(gd);
1398                 xfs_qm_internalqcheck_dqadjust(ip, gd);
1399         }
1400         xfs_iput(ip, lock_flags);
1401         *res = BULKSTAT_RV_DIDONE;
1402         return (0);
1403 }
1404
1405
1406 /* PRIVATE, debugging */
1407 int
1408 xfs_qm_internalqcheck(
1409         xfs_mount_t     *mp)
1410 {
1411         xfs_ino_t       lastino;
1412         int             done, count;
1413         int             i;
1414         xfs_dqtest_t    *d, *e;
1415         xfs_dqhash_t    *h1;
1416         int             error;
1417
1418         lastino = 0;
1419         qmtest_hashmask = 32;
1420         count = 5;
1421         done = 0;
1422         qmtest_nfails = 0;
1423
1424         if (! XFS_IS_QUOTA_ON(mp))
1425                 return XFS_ERROR(ESRCH);
1426
1427         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1428         XFS_bflush(mp->m_ddev_targp);
1429         xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE | XFS_LOG_SYNC);
1430         XFS_bflush(mp->m_ddev_targp);
1431
1432         mutex_lock(&qcheck_lock);
1433         /* There should be absolutely no quota activity while this
1434            is going on. */
1435         qmtest_udqtab = kmem_zalloc(qmtest_hashmask *
1436                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1437         qmtest_gdqtab = kmem_zalloc(qmtest_hashmask *
1438                                     sizeof(xfs_dqhash_t), KM_SLEEP);
1439         do {
1440                 /*
1441                  * Iterate thru all the inodes in the file system,
1442                  * adjusting the corresponding dquot counters
1443                  */
1444                 if ((error = xfs_bulkstat(mp, &lastino, &count,
1445                                  xfs_qm_internalqcheck_adjust, NULL,
1446                                  0, NULL, BULKSTAT_FG_IGET, &done))) {
1447                         break;
1448                 }
1449         } while (! done);
1450         if (error) {
1451                 cmn_err(CE_DEBUG, "Bulkstat returned error 0x%x", error);
1452         }
1453         cmn_err(CE_DEBUG, "Checking results against system dquots");
1454         for (i = 0; i < qmtest_hashmask; i++) {
1455                 h1 = &qmtest_udqtab[i];
1456                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1457                         xfs_dqtest_cmp(d);
1458                         e = (xfs_dqtest_t *) d->HL_NEXT;
1459                         kmem_free(d, sizeof(xfs_dqtest_t));
1460                         d = e;
1461                 }
1462                 h1 = &qmtest_gdqtab[i];
1463                 for (d = (xfs_dqtest_t *) h1->qh_next; d != NULL; ) {
1464                         xfs_dqtest_cmp(d);
1465                         e = (xfs_dqtest_t *) d->HL_NEXT;
1466                         kmem_free(d, sizeof(xfs_dqtest_t));
1467                         d = e;
1468                 }
1469         }
1470
1471         if (qmtest_nfails) {
1472                 cmn_err(CE_DEBUG, "******** quotacheck failed  ********");
1473                 cmn_err(CE_DEBUG, "failures = %d", qmtest_nfails);
1474         } else {
1475                 cmn_err(CE_DEBUG, "******** quotacheck successful! ********");
1476         }
1477         kmem_free(qmtest_udqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1478         kmem_free(qmtest_gdqtab, qmtest_hashmask * sizeof(xfs_dqhash_t));
1479         mutex_unlock(&qcheck_lock);
1480         return (qmtest_nfails);
1481 }
1482
1483 #endif /* DEBUG */